<form name="searchFrom" role="form">
  <div class="form-group">
    <label for="productName">商品名称:</label>
    <input type="text" id="productName" class="form-control" placeholder="商品名称">
  </div>
  <div class="form-group">
    <label for="productPrice">商品价格:</label>
    <input type="number" id="productPrice" class="form-control" placeholder="商品价格">
  </div>
  <div class="form-group">
    <label for="productCategory">商品类别:</label>
    <select id="productCategory" class="form-control">
      <option>很高兴看到你</option>
      <option>很高兴看到你</option>
      <option>很高兴看到你</option>
      <option>很高兴看到你</option>
    </select>
  </div>
  <div class="form-group">
    <button type="submit" class="btn btn-primary btn-block">搜索</button>
  </div>
</form>
